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The U.S. Environmental Protection Agency (EPA) is proposing changes to Clean Air Act standards for boilers and certain incinerators based on extensive analysis, review and consideration of data and input from states, environmental groups, industry, lawmakers and the public. The proposed reconsideration would achieve extensive public health protections through significant reductions in toxic air pollutants, including mercury and soot, while increasing the ruleâ€™s flexibility and addressing compliance concerns raised by industry and labor groups. The changes also cut the cost of implementation by nearly 50 percent from the original 2010 proposed rule while maintaining health benefits. Soot and other harmful pollutants released by boilers and incinerators can lead to adverse health effects including cancer, heart disease, aggravated asthma and premature death. In addition, toxic pollutants such as mercury and lead that will be reduced by this proposal.

The U.S. Environmental Protection Agency (EPA) is proposing changes to Clean Air Act standards for boilers and certain incinerators based on extensive analysis, review and consideration of data and input from states, environmental groups, industry, lawmakers and the public. The proposed reconsideration would achieve extensive public health protections through significant reductions in toxic air pollutants, including mercury and soot, while increasing the ruleâ€™s flexibility and addressing compliance concerns raised by industry and labor groups. The changes also cut the cost of implementation by nearly 50 percent from the original 2010 proposed rule while maintaining health benefits. Soot and other harmful pollutants released by boilers and incinerators can lead to adverse health effects including cancer, heart disease, aggravated asthma and premature death. In addition, toxic pollutants such as mercury and lead that will be reduced by this proposal.

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These standards cover more than 200,000 boilers and incinerators that emit harmful air pollution, including mercury, cadmium, and particle pollution.

More than 99 percent of boilers in the country are either clean enough that they are not covered by these standards or will only need to conduct maintenance and tune-ups to comply. Todayâ€™s proposals focus on the less than one percent of boilers that emit the majority of pollution from this sector. For these high emitting boilers, typically operating at refineries, chemical plants and other industrial facilities, EPA is proposing more targeted emissions limits that protect Americansâ€™ health and provide industry with practical, cost-effective options to meet the standards â€“ informed by data from these stakeholders. These limits are based on currently available technologies that are in use by sources across the country.

The major source proposal covers approximately 14,000 boilers â€“ less than one percent of all boilers in the United States â€“ located at large sources of air pollutants, including refineries, chemical plants, and other industrial facilities. EPA is proposing to create additional subcategories and revise emissions limits. EPA is also proposing to provide more flexible compliance options for meeting the particle pollution and carbon monoxide limits, replace numeric emissions limits with work practice standards for certain pollutants, allow more flexibility for units burning clean gases to qualify for work practice standards and reduce some monitoring requirements. EPA estimates that the cost of implementing these standards remains about $1.5 billion less than the April 2010 proposed standards. Health benefits to children and the public associated with reduced exposure to fine particles and ozone from these large source boilers have increased by almost 25 percent.

The proposal also covers about 187,000 boilers located at small sources of air pollutants, including commercial buildings, universities, hospitals and hotels. However, due to how little these boilers emit, 98 percent of area source boilers would simply be required to perform maintenance and routine tune-ups to comply with these standards. Only 2 percent of area source boilers may need to take additional steps to comply with the rule. To increase flexibility for most of these sources, EPA is proposing to require initial compliance tune-ups after two years instead after the first year.

There are 95 solid waste incinerators that burn waste at a commercial or an industrial facility, including cement manufacturing facilities. EPA is proposing to adjust emissions limits for waste-burning cement kilns and for energy recovery units.

EPA is also proposing revisions to its final rule which identified the types of non-hazardous secondary materials that can be burned in boilers or solid waste incinerators. Following the release of that final rule, stakeholders expressed concerns regarding the regulatory criteria for a non-hazardous secondary material to be considered a legitimate, non-waste fuel, and how to demonstrate compliance with those criteria. To address these concerns, EPAâ€™s proposed revisions provide clarity on what types of secondary materials are considered non-waste fuels, and greater flexibility. The proposed revisions also classify a number of secondary materials as non-wastes when used as a fuel and allow for a boiler or solid waste operator to request that EPA identify specific materials as a non-waste fuel.